$\lim_{x\to0}\left(9tan\left(x\right)\right)^{9cosx}$

$w^2x+3w+w^2=0$

$\int e^{6w}cos3wdw$

$25+70x+49^2$

$-3x^3+5x^2+5x$

$-4\left(4-2+5\right)-1-\left|8+\left(-3-1\right)-\left(-7-4\right)\right|+3-4$

$\frac{\sin\left(x\right)^2}{\cos\left(x\right)^2}-\cos\left(x\right)^2\tan\left(x\right)^2+\sin\left(x\right)^2$